Womens/Ladies Heart Pattern Thermal Socks With Brushed Inner (Pack Of 3) Acrylic, Polyamide, Ladies thermal socks with heart pattern and soft brushed inner. Three pairs per pack. Sizing: UK 4-8, EUR 37-41 (Please note: Euro sizing on packaging is incorrectly labeled). 80% Acrylic, 20% Polyamide. Machine washable.